EP1098565B1 - Compositions de lutte contre des rongeurs fouisseurs et techniques afferentes - Google Patents

Compositions de lutte contre des rongeurs fouisseurs et techniques afferentes Download PDF

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Publication number
EP1098565B1
EP1098565B1 EP99932580A EP99932580A EP1098565B1 EP 1098565 B1 EP1098565 B1 EP 1098565B1 EP 99932580 A EP99932580 A EP 99932580A EP 99932580 A EP99932580 A EP 99932580A EP 1098565 B1 EP1098565 B1 EP 1098565B1
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EP
European Patent Office
Prior art keywords
foam
composition
mustard
burrow
foaming agent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99932580A
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German (de)
English (en)
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EP1098565A1 (fr
Inventor
Donald Sutherland
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schmunk David
Original Assignee
Schmunk David
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Filing date
Publication date
Application filed by Schmunk David filed Critical Schmunk David
Publication of EP1098565A1 publication Critical patent/EP1098565A1/fr
Application granted granted Critical
Publication of EP1098565B1 publication Critical patent/EP1098565B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/16—Foams
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
    • A01N65/08—Magnoliopsida [dicotyledons]

Definitions

  • the present invention relates to methods and compositions for the control and extermination of fossorial rodents.
  • Fossorial rodents include Richardson ground squirrels (spermophilus richardsonii ). commonly referred to as gophers. which are a destructive pest species throughout the prairie regions of North America. The burrowing and feeding activities of ground squirrels impact heavily on forage and grain crops. The burrows themselves create a physical hazard to horses, cattle, farm equipment and the unwary pedestrian. Other fossorial rodents such as Norway rats ( Ratus norvegicus ) and pocket gophers ( Thomomys talpoides ) are also considered pests. Norway rats in particular are difficult to control in both urban and rural settings.
  • strychnine and similar poisons are environmentally disadvantageous because of the danger posed to pets, predators and scavengers which may feed on the dead ground squirrels or the poisoned bait itself. These may include such valued species as hawks, eagles, owls, coyotes, badgers and the like. Because of this danger, there is Canadian legislation which limits the concentration of the poison which may be used, which limits the effectiveness of the poison. In mid-summer when food supplies for rodents are abundant, the effectiveness of baited poisons in dilute concentrations approaches nil.
  • Foam-base rodent control systems are known. In most cases, the foam is used as a carrier for a poison which is ingested by the rodent.
  • a rigid or flexible foam plastic is used to carry a rodenticide. The foam is applied to block openings to a burrow or a hole in which the target rodent resides. It is intended that the rodent eat the foam to reopen the blocking opening and thereby ingest the poison.
  • Adhesive foams containing rodenticide have been used which stick to the rodent causing grooming behaviour. This causes the rodenticide to be taken up orally.
  • an apparatus to exterminate rodents includes an enclosure which is filled with a foam upon entry of a rodent into the apparatus.
  • the foam hardens to encapsulate the animal, whereupon the device may be disposed of.
  • the invention comprises a method of exterminating burrowing animals, said method comprising the steps of passing a treatment composition comprising a foaming agent through an aerating nozzle down a burrow containing an animal such that the burrow is substantially filled with a non-persistent foam, thereby forcing the animal to inhale the foam.
  • the treatment composition used in the method is biodegradable and further comprises a respiratory irritant. It has been found that the respiratory irritant is preferably finely ground seeds of plants of the genus Brassica (family Cruciferae) , commonly referred to as mustard. In particular, ordinary mustard, also known as white or yellow mustard, is used. These seeds are from Brassica alba (also known as Brassica hirta or Sinapis alba ) or white mustard.
  • the invention provides a rodenticidal composition for use in the extermination of a burrowing animal resident in a burrow, said composition comprising a foaming agent and finely ground mustard seed.
  • the invention comprises the use of a composition for asphyxiating a burrowing animal resident in a burrow, wherein said composition comprises a foaming agent and does not include a synthetic resin.
  • the invention comprises the use of a non-persistent foam composition for asphyxiating a burrowing animal resident in a burrow.
  • the concentration of finely ground mustard in preferred embodiments of the invention is between about 0.3% and about 0.5% (w:v) when diluted and ready to use.
  • the invention may be supplied in a concentrated form which is diluted with water to use level concentrations.
  • the foaming agent may be a liquid surfactant which forms a relatively stable and dense non-persistent foam when aerated.
  • the foaming agent is a commercially available aqueous forest fire suppressant foam which is biodegradable.
  • the present invention has specific application to ground squirrels, pocket gophers, moles, rats and rabbits, which are all burrowing rodents.
  • the methods and compositions disclosed herein may be readily adapted to control any unwanted burrowing animal by those skilled in the art and any such adaptations are intended to fall within the scope of the invention claimed herein.
  • the preferred embodiment of the invention comprises a mixture of a liquid concentrate foaming agent and ground mustard seed. This mixture is used by combining it with water and aerating to create a foam which is introduced into the burrow to be treated.
  • the foaming agent and ground mustard may be dry mixed before the addition of water or in a further alternative embodiment, may be prepared in a ready-to-use concentration.
  • Suitable foaming agents create a relatively dense non-persistent foam.
  • foam refers a mass of gaseous bubbles formed in a liquid.
  • non-persistent refers to the fact that the foam will remain fluid and eventually separate into its liquid and gaseous components. Foams which are not “non-persistent” will harden into a permanent foam where the gas bubbles are trapped in a substantially solid phase.
  • foams include urea-formaldehyde, polyurethane or thermoplastic polymer based foams and are not intended to be used with the present invention.
  • Suitable foaming agents should create a non-persistent, relatively stable and dense foam upon aeration.
  • the foam's function is to substantially fill the animal burrow, leaving no air pockets, such that the animal is forced to inhale the foam into its trachea and lungs.
  • the foam should be dense enough to cause asphyxiation of the animal within a reasonable length of time and stable enough to remain in emulsion for that length of time.
  • well known forest fire suppressant foams are used. Phos-ChekTM WD-881 manufactured and supplied by Monsanto Company, St. Louis, Missouri is satisfactory as well as Fire-Trol® FireFoam® manufactured and supplied by Chemonics Industries (Canada) Ltd.
  • compositions of these foaming agents are trade secrets of their manufacturers; however, they are known to be a mixture of surfactants and other performance components dissolved in a water-miscible system.
  • Generic foaming agents such as ammonium deceth sulfate are also suitable for use with the present invention.
  • Foam-creating surfactants are well-known to those skilled in the art and suitable foaming agents may be determined with minimal experimentation.
  • the foaming agent be biodegradable in order to minimize any adverse environmental impact.
  • biodegradable refers to substances capable of being decomposed by bacteria or other living organisms or spontaneous decomposition if left in a natural environment.
  • foaming agents disclosed above are water-miscible agents and are therefore used with water as the carrier. It is readily appreciated that alternative foaming agents which are immiscible in water may be used and therefore, different appropriate carriers may be used in the place of water. However, water is the preferred carrier of the foaming agent and the mustard because it is ubiquitous, inexpensive and generally benign.
  • the foam asphyxiates the rodents because it substantially fills the burrow, including all anticlinal pockets which would capture air pockets if the burrow were to be filled with water.
  • the ground mustard seed acts as a respiratory irritant which hastens the asphyxiation caused by the foam.
  • the foam is likely irritating to the rodent's respiratory system, even in the dilute concentrations used in the preferred embodiment herein.
  • the proprietary foaming agents disclosed above are irritating to human skin and mucosal membranes. In effect, it is believed that the foam fills the burrow completely and therefore forces the rodent to inhale the foam and the mustard which is dissolved and colloidally dispersed in the foam.
  • the rodent is quickly asphyxiated by the combination of the foam and the mustard. It is believed that the mustard speeds up the asphyxiation by further irritating the respiratory epithelium of the respiratory tract and lungs or by causing gasping which causes the rodent to inhale the foam more deeply and in larger amounts.
  • respiratory irritant refers to (a) any substance which irritates the respiratory epithelium of the animals respiratory tract or lungs; (b) any substance which is shown to hasten the asphyxiation of an animal which inhales a combination of a non-persistent foam and the substance; or (c) any substance which causes the death of an animal which inhales the substance.
  • the effective ingredient in the mustard is the mustard oil which forms when the mustard powder is contacted with water.
  • Mustard oil is responsible for the "hot" taste of mustard.
  • White mustard seeds contain the glucoside sinalbin, which is hydrolysed to produce mustard oil by the enzyme myrosinase, which is present in the mustard powder and which is activated by water. It is assumed that two other varieties of mustard seed, black mustard seeds from the mustard plant Brassica nigra , and brown mustard from the mustard plant Brassica juncea contain similar glucosides and enzymes which also yield a mustard oil. Black mustard and brown mustard are generally more potent than white mustard and it is assumed that they may be used alternatively in the place of white mustard in the preferred embodiment of the present invention.
  • Mustard is the preferred respiratory irritant because it is effective in hastening the death of rodents which have inhaled the foam/mustard combination, it is non-toxic to humans and other wildlife species. is biodegradable and is otherwise environmentally innocuous. Furthermore, it is available in commercial quantities in a finely ground form which disperses quickly and evenly into the concentrated foaming agent and remains suspended as the foaming agent is diluted and aerated.
  • Alternative respiratory irritants may share all of or many of these characteristics and include ground horseradish and powdered elemental sulphur. These specific alternatives are effective but less so than the ground mustard.
  • the respiratory irritant may also be one of various known toxic substances which may be absorbed through the respiratory tract and lungs. These poisons may cause death by avenues other than asphyxiation but are introduced to the rodent because the rodent inhales the foam. However, these toxic substances are not preferred because of the potential danger to humans, potential damage to other desirable species and other disadvantages.
  • a concentrated composition is made by mixing the foaming agent in liquid concentrate form with the mustard powder, preferably in an approximate 3:1 ratio by weight. with the goal of achieving a 1% (w:v) foaming agent concentration and approximately 0.3% to 0.5% (w:v) mustard concentration when the concentrate is diluted to a use level.
  • the proprietary concentrated foaming agents have specific gravities of approximately 1.029 kg per liter and it is generally recommended by the respective manufacturers that it be used in 0.1% to 1% concentration. Decreasing the proportion of mustard does decrease the effectiveness of the treatment; however, a final concentration of approximately 0.3% is still effective. Increasing the proportion of mustard beyond 0.5% ratio does not appear to significantly increase the effectiveness of the composition and is therefore is not preferred.
  • the mustard is screened with a 200 mesh (0.07mm) to remove larger particles or clumps of powder. This screening step is not essential but is preferred.
  • the concentrated aqueous mixture of foaming agent and mustard is then added to sufficient water to dilute the foaming agent to about 1% and the mustard to 0.5%. It is important to add the foaming agent to the water and not the other way around to prevent premature foaming of the composition.
  • the diluted mixture or field solution may then be stirred, taking care to prevent aeration which will cause foaming.
  • the mixture is then pumped through an aerating nozzle to create the foam with the mustard powder suspended or slightly dissolved throughout the foam. The foam is directed into the animal burrow until the burrow is completely filled with the foam.
  • Pocket gophers are known to create internal plugs in their burrows. Therefore, in some cases, it may be necessary to blow out the internal plug by pressurizing the burrow at the same time as the foam is introduced to the burrow. This may be accomplished by inserting the aerating nozzle into the burrow and packing dirt around the nozzle to block the burrow opening while inserting the foam.
  • the method of the present invention may readily be adapted to control rodents resident in any type of enclosed space with a limited opening such as ground burrows.
  • the field solution was then sprayed through an aerating nozzle under a pressure of approximately 138 kPa to 207 kPa (20 to 30 p.s.i) into live gopher burrows of two separate plots of land.
  • a pressure of approximately 138 kPa to 207 kPa (20 to 30 p.s.i) into live gopher burrows of two separate plots of land.
  • At approximately 138 kPa (20 p.s.i.) one litre of field solution produces approximately 5 litres of foam. Higher pressures will increase the volume of foam created.
  • One plot was a 7500 square meter range pasture area while the other was a 1250 square meter alfalfa field.
  • 303 live burrows were treated and, on average, each burrow took approximately 15 seconds of treatment.
  • burrow activity was monitored, both before and after treatment, by shovelling dirt into a burrow opening and looking for re-excavation, indicating burrowing activity in that hole.

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Zoology (AREA)
  • Dentistry (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Plant Pathology (AREA)
  • Mycology (AREA)
  • Biotechnology (AREA)
  • Natural Medicines & Medicinal Plants (AREA)
  • Microbiology (AREA)
  • Pest Control & Pesticides (AREA)
  • Toxicology (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Catching Or Destruction (AREA)

Claims (16)

  1. Procédé pour exterminer des animaux fouisseurs, le dit procédé comprenant les étapes consistant :
    (a) à faire passer une composition de traitement comprenant un agent moussant à travers une buse d'aération en direction d'un terrier renfermant un animal, de telle sorte que le terrier est sensiblement rempli de mousse non persistante, forçant ainsi l'animal à inhaler la mousse.
  2. Procédé selon la revendication 1, dans lequel l'agent moussant est biodégradable.
  3. Procédé selon la revendication 1 ou 2, dans lequel la composition de traitement comprend, en outre, une substance irritante respiratoire.
  4. Procédé selon la revendication 3, dans lequel la substance irritante respiratoire est de la graine de moutarde broyée.
  5. Procédé selon la revendication 4, dans lequel la concentration en graine de moutarde broyée entrant dans la composition de traitement est comprise entre environ 0,3% et 0,5% (w:v).
  6. Composition rongicide comprenant un agent moussant et de la graine de moutarde finement broyée.
  7. Composition rongicide selon la revendication 6, dans laquelle l'agent moussant est biodégradable.
  8. Composition rongicide selon la revendication 6, dans laquelle l'agent moussant est non persistent.
  9. Composition rongicide selon l'une quelconque des revendications 6 à 8, dans laquelle la concentration en graine de moutarde broyée est comprise entre environ 0,3% et 0,5% (w:v).
  10. Utilisation d'une composition pour asphyxier un animal fouisseur résidant dans un terrier, dans laquelle la dite composition comprend un agent moussant non persistent et n'inclut pas de résine synthétique.
  11. Utilisation selon la revendication 10, dans laquelle la composition est biodégradable.
  12. Utilisation selon la revendication 10, dans laquelle la composition comprend, en outre, une substance irritante respiratoire.
  13. Utilisation selon la revendication 12, dans laquelle la substance irritante respiratoire est de la graine de moutarde finement broyée.
  14. Utilisation d'une composition moussante non persistante pour asphyxier un animal fouisseur résidant dans un terrier.
  15. Utilisation selon la revendication 14, dans laquelle la composition moussante comprend, en outre, une substance irritante respiratoire.
  16. Utilisation selon la revendication 15, dans laquelle la substance irritante respiratoire est de la poudre de moutarde finement broyée.
EP99932580A 1998-07-22 1999-07-22 Compositions de lutte contre des rongeurs fouisseurs et techniques afferentes Expired - Lifetime EP1098565B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US12044698A 1998-07-22 1998-07-22
US120446 1998-07-22
PCT/CA1999/000667 WO2000004773A1 (fr) 1998-07-22 1999-07-22 Compositions de lutte contre des rongeurs fouisseurs et techniques afferentes

Publications (2)

Publication Number Publication Date
EP1098565A1 EP1098565A1 (fr) 2001-05-16
EP1098565B1 true EP1098565B1 (fr) 2002-10-23

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EP99932580A Expired - Lifetime EP1098565B1 (fr) 1998-07-22 1999-07-22 Compositions de lutte contre des rongeurs fouisseurs et techniques afferentes

Country Status (12)

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US (2) US6558684B1 (fr)
EP (1) EP1098565B1 (fr)
CN (1) CN1198501C (fr)
AT (1) ATE226392T1 (fr)
AU (1) AU751635B2 (fr)
BR (1) BR9912678A (fr)
CA (2) CA2262826A1 (fr)
DE (1) DE69903637T2 (fr)
IL (1) IL141001A0 (fr)
MX (1) MXPA01000782A (fr)
WO (1) WO2000004773A1 (fr)
ZA (1) ZA200100760B (fr)

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US10653904B2 (en) 2017-12-02 2020-05-19 M-Fire Holdings, Llc Methods of suppressing wild fires raging across regions of land in the direction of prevailing winds by forming anti-fire (AF) chemical fire-breaking systems using environmentally clean anti-fire (AF) liquid spray applied using GPS-tracking techniques
US11865390B2 (en) 2017-12-03 2024-01-09 Mighty Fire Breaker Llc Environmentally-clean water-based fire inhibiting biochemical compositions, and methods of and apparatus for applying the same to protect property against wildfire
US11865394B2 (en) 2017-12-03 2024-01-09 Mighty Fire Breaker Llc Environmentally-clean biodegradable water-based concentrates for producing fire inhibiting and fire extinguishing liquids for fighting class A and class B fires
US11826592B2 (en) 2018-01-09 2023-11-28 Mighty Fire Breaker Llc Process of forming strategic chemical-type wildfire breaks on ground surfaces to proactively prevent fire ignition and flame spread, and reduce the production of smoke in the presence of a wild fire
US11911643B2 (en) 2021-02-04 2024-02-27 Mighty Fire Breaker Llc Environmentally-clean fire inhibiting and extinguishing compositions and products for sorbing flammable liquids while inhibiting ignition and extinguishing fire

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Also Published As

Publication number Publication date
DE69903637T2 (de) 2003-06-12
CA2262826A1 (fr) 2000-01-22
EP1098565A1 (fr) 2001-05-16
AU751635B2 (en) 2002-08-22
BR9912678A (pt) 2001-11-27
IL141001A0 (en) 2002-02-10
US6558684B1 (en) 2003-05-06
CA2299415A1 (fr) 2000-02-03
CN1307446A (zh) 2001-08-08
US20030152604A1 (en) 2003-08-14
MXPA01000782A (es) 2002-04-08
CN1198501C (zh) 2005-04-27
DE69903637D1 (de) 2002-11-28
AU4892599A (en) 2000-02-14
WO2000004773A1 (fr) 2000-02-03
ATE226392T1 (de) 2002-11-15
ZA200100760B (en) 2001-07-11
US7070767B2 (en) 2006-07-04
CA2299415C (fr) 2007-06-12

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